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Re: az-el rotor cost



Roy is correct, but there are some rather easy mods floating around to get
the required feedback from a "click and bang" rotator.

73,
Joe
ka0yos@amsat.org

----- Original Message -----
From: "Roy Welch" <rdwelch@swbell.net>
To: "Robert Oler" <cvn65vf94@msn.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Wednesday, January 17, 2001 6:30 PM
Subject: Re: [amsat-bb] az-el rotor cost


> One caution.  If you are planning to use automatic antenna position
control
> with devices such as the Kansas City Tracker, etc.  Be sure the rotors you
> get have a potentiometer position feedback.  The solonoid "click click"
> type of position indicators will not work with these controllers.  The
> Aliance U100 for example is one of these.  The other Alliance types may be
> the same.
>
> Robert Oler wrote:
> >
> > >From: Estes Wayne-W10191 <W10191@motorola.com>
> > >To: amsat-bb@AMSAT.Org
> > >Subject: [amsat-bb] az-el rotor cost
> > >Date: Wed, 17 Jan 2001 17:10:09 -0600
> > >
> > >I sent this a couple days ago, but never saw it on amsat-bb-digest.
> > >
> > >Rip Smith wrote:
> > >
> > >when was the last time you priced az-el rotators?
> > >
> > >Wayne replies:
> > >
> > >It seems like almost everybody on this list bought a G-5400 Az-El
rotor.
> > >But not all of us.  My Az-El rotors are "Orbit 360", TV antenna rotors
> > >which are now discontinued, but sold for about $45 each at my local
home
> > >improvement store.  They are smaller and less powerful, but for 5 years
> > >they have been reliable for my VHF and UHF CP Yagis (10-foot booms with
a
> > >7.5 foot fiberglass cross-boom).  The azimuth rotor was a bit flaky
when I
> > >added a 10-meter turnstile for a short time to work SSB on RS-15.  And
now
> > >I have a 2-element 50 MHz beam on top (azimuth only) which seems a bit
hard
> > >on the azimuth rotor.  The rotor doesn't need to be very powerful if
the
> > >antennas are small and the load is balanced in the elevation plane.
> > >
> > >Look for used Orbit 360 rotors.  Or buy a used Alliance U-100 or U-110
> > >rotor which is slightly more powerful.  Any rotor will do for azimuth
as
> > >long as the antennas are small.  The elevation rotor must be a design
that
> > >allows you to run the mast through the middle of the rotor (such as
U-100,
> > >U-110, Orbit-360).  With a little ingenuity you can have functional
Az-El
> > >rotors for about 1/4 the price of the Yaesu G-5400 Az-El rotors.
> > >
> > >Wayne Estes W9AE
> > >Mundelein, IL, USA
> > >----
> > >Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > >To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> > >
> > Couldnt agree more.  I have a couple of TV elevation rotors in use here
at
> > the House and they work pretty much as advertised turning pretty large
> > "arrays" (a 10 meter turnstile on top? wow!).  The trick is to have them
> > balanced.  My dishes are all elevated by tV sat dish actuators.  One is
> > rotated in azimuth by a HAM IV and the other two (including the new 30
> > footer) is by a garage door motor.
> >
> > Works great.
> > _________________________________________________________________
> > Get your FREE download of MSN Explorer at http://explorer.msn.com
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
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>
> --
> 73, Roy
>
> Internet: w0sl@amsat.org
> Home Page: http://home.swbell.net/rdwelch
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
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>
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